Improvement in treating carbonic acid for hardening stone



D. M. SPROGLE.

Improvement in Treating Carbonic-Acid for Hardening Stone.

No. 130,951. Patented Aug. 27, 1872.

UNITED STATES PATENT OFFICE.

DANIEL M. SPROGLE, OF ANNAPOLIS, MARYLAND.

IMPROVEMENT IN TREATING CARBO NlC ACID FOR HARDENING STONE.

Specification forming part of Letters Patent No. 130,951, dated August 27, 1872.

This invention relates to improvements on apparatus for treating carbonic-acid gas on its way from a generating-furnace to a kiln or chamber for containing cement which is to be indurated by said gas. My objects are, first, to prevent smoke which escapes from the furnace in starting a fire therein, from entering the kiln or hardening chamber; second, to improved means for purifying the gas and charging it with watery vapor on its way from the furnace into the kiln or hardening chamber; third, to improved means for preserving the carbonated water for use in mixing cements and preparing them for conversion into stone.

The following description of my apparatus will enable others skilled in the art to understand it.

In the accompanying drawing, A represents the furnace, in which the carbonic-acid gas is produced from burning charcoal. In this furnace is a grate, a, beneath which are passages b, for the free supply of air to the burning coal. From this furnace a flue or pipe, B, leads to the curing-kiln, in which the cement, in the shape of building-blocks or other useful objects, is placed and closely confined, so as to prevent the escape of the gas. D represents a smoke-escape flue, which leads off from the pipe B near the furnace, and 0 rep resents a damper in this pipe for regulating the draft or escape of smoke. g is another damper, which is applied in the pipe B, between the flue D and a water-tank or chamber, B, for the purpose of cutting off the passage of smoke through pipe B when a fire is first started in the furnace, and when damper e is opened to allow the escape of smoke through pipe D. The chamber B is an enlargement of the pipe B, arranged between the furnace and the curing-kiln, for the purpose of containing water which falls from a rose-nozzle, f, and afl'ording an absorbing surface for purifying the gas on its way into the kiln. This water-chamber is also for the purpose of retaining water a sufficient length of time under the influence of the gas to become charged therewith, which carbonated water escapes into a vessel, J, below, through an overflow-pipe, J, which rises sufficiently high in said chamber to keep a quantity of water therein at all times, but not so high'as to allow the water to flow through the pipe B into the kiln. The pipe J is preferably arranged at that end of chamber B nearest the kiln. The cold water is supplied from an elevated reservoir, 0, through a pipe, c,.and rose-nozzle, f, which pipe and nozzle are preferably arranged over that end of the chamber B nearest the furnace.

In starting a fire in thefurnace the damper g is closed, and the damper 0 opened, which will prevent smoke from escaping into the kiln and discoloring the surface of the cement. When the coals are incandescent and no considerable amount of smoke escapes from the furnace the damper e is shut and the damper g opened, which will allow the gas to pass on through the'pipe B into the kiln. Water from the reservoir 0 is-then allowed to flow in a finely-divided spray across or through the stream of gas into the chamber B, when a portion of this water will be floated along with the gas, charged therewith, and conveyed into the kiln. The falling spray will be charged with gas, and as the chamber B becomes too full the surplus carbonated water will flow I ent, is-

1. A flue or passage, D, for conveying off the smoke at the first starting of the fire in the carbonic-acid-gas generating-chamber A, substantially as described.

2. The water'tank 0r chamber B, serving both as a water-holder and a gas-conducting pipe, substantially as and for the purpose described.

3. The water-reservoir O, in combination with the water-tank or chamber B, which serves as a water-holder and gas-conducting pipe, substantially as described.

4. The overfl0w-pipe J of the Water-tank or chamber B, substantially as described.

5. The combination of the reservoir J, the water-tank 0r holder 0, overflow-pipe J, and chamber B, which receives the overflow-water, with a carbonic-acid-gas generator, substantially as described.

DANIEL M. SPROGLE.

Witnesses:

J. N. CAMPBELL, JAMES MARTIN, J r. 

